CN103438964B - A kind of hermetic type open commutator - Google Patents
A kind of hermetic type open commutator Download PDFInfo
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- CN103438964B CN103438964B CN201310405391.0A CN201310405391A CN103438964B CN 103438964 B CN103438964 B CN 103438964B CN 201310405391 A CN201310405391 A CN 201310405391A CN 103438964 B CN103438964 B CN 103438964B
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Abstract
The present invention discloses a kind of hermetic type open commutator, and it comprises: control box, and this control box has for the parts providing power that commutate; Be positioned at the rolling disc below control box, described rotating disk has some spouts; The floating disc coordinated with described rolling disc, described floating disc has the pod apertures corresponding with described spout; And be positioned at the water inlet pipe at described open commutator center, above described water inlet pipe, be provided with spreader.The commutation process of commutator of the present invention is steady, should have good symmetry and repeatability; Fluid is as far as possible stable, symmetrical in nozzle exit fluidised form.Avoid dabbling and interior leakage of commutator, and commutation process flow device flow system flow produces interference.
Description
Technical field
The present invention relates to flow metering field, particularly relate to a kind of open commutator for flow metering standard set-up, this open commutator has the structure that can switch liquid flow direction fast of hermetic type.
Background technology
Flow standard device carries out transmission of quantity value standard set-up to flow instrument, and it is mainly used in the accuracy, repeatability, the linearity, degree of stability etc. of test traffic instrument.Along with the development of industrialization, channelization, the proportion of flow instrument shared by whole instrument industry is increasing, and the effect of flow standard device also more and more highlights.
Commutator is the core component of high-level flow apparatus, and the uncertainty of commutator is one of main source of flow apparatus uncertainty simultaneously, and its design level directly affects the accuracy of flow metering.The principle of work of commutator utilizes mechanical part action to change liquid flow direction, makes liquid continuous flow cross measured stream gauge, make measured stream gauge reach synchronous with the Measuring Time of standard.Traditional commutator is divided into enclosed commutator and open commutator.Enclosed commutator is generally commutated by piston cylinder operator; but because its commutating speed is slow; the pressure at piston two ends is wayward, and time difference commutator often can be caused to swap out, changing to is comparatively large, can introduce larger uncertainty; in addition; the circulation area change in commutation process of enclosed commutator greatly, can cause the fluctuation of flow, likely have an impact to the metering performance of tested table; piston and commutator inwall are slipper seal, have higher risk of leakage.Open commutator primary structure comprises nozzle, water trap and drive unit, open commutator is compared to enclosed commutator, can not have an impact to the flow field of tested fluid in commutation process, there is obvious advantage, open commutator generally realizes the object of changing the direction of a stream of water by the position or direction changing nozzle or water trap, its nozzle and water trap position are for opening wide structure, and experiment liquid is directly communicated with air; In recent years, along with the research and development (as hot water flow device) of the flow apparatus to some volatile liquids, require at commutator place experimental liquid without evaporation, and there is higher measurement accuracy.Therefore, exploitation is needed to have the commutator of closed structure.
Summary of the invention
It is under the prerequisite ensureing its commutation ability that the present invention will deal with problems, realize the leakproofness of its structure, make commutator in the forward and backward and commutation process of commutation not with the open state of atmosphere, avoid hot water outwards to evaporate to cause by commutator and weigh inaccurate problem.
The invention provides a kind of hermetic type open commutator, it comprises: control box, and this control box has for the parts providing power that commutate; Be positioned at the rolling disc below control box, described rotating disk has some spouts; The floating disc coordinated with described rolling disc, described floating disc has the pod apertures corresponding with described spout; And be positioned at the water inlet pipe at described open commutator center, above described water inlet pipe, be provided with spreader.
Wherein, described control box is positioned at the topmost of steering gear, and according to the control signal of outside, control box adjusts the liquid flow direction in commutator, realizes commutation.
Wherein, between control box and rolling disc, top cover is provided with.
Wherein, have through hole in the middle of described top cover, the marginal portion of described top cover has the flange stretched out, and described flange is provided with screw, adopts the bolt through screw to be fixed in the main body of commutator by top cover.
Wherein, described open commutator comprises base further, and described base comprises water inlet pipe, rising pipe, by-pass pipe and bus structure, and provides support for whole commutator.
Wherein, be provided with spring device in the bottom of floating disc, described spring structure ensures that floating disc keeps close contact state with rolling disc all the time.
Wherein, described spreader comprises cone, floating guide rod and rubber disc.
Wherein, described control box arranges optoelectronic switch.
The commutation process of commutator of the present invention is steady, should have good symmetry and repeatability; Fluid is as far as possible stable, symmetrical in nozzle exit fluidised form.Avoid dabbling and interior leakage of commutator, and commutation process flow device flow system flow produces interference.
Accompanying drawing explanation
The structural representation of the open commutator of Fig. 1 closed type of the present invention;
The perspective view of parts in Fig. 2 control box of the present invention;
The perspective view of Fig. 3 rolling disc of the present invention;
The perspective view of Fig. 4 floating disc of the present invention.
Embodiment
For the ease of understanding the present invention, below in conjunction with accompanying drawing, embodiments of the invention being described, it will be appreciated by those skilled in the art that following explanation is just for the ease of making an explanation to invention, and not as the concrete restriction to its scope.
Be illustrated in figure 1 the open commutator of closed type of the present invention, described open commutator comprises control box 1, described control box 1 comprises the control assembly for commutation provides the parts of power and controls commutation, described control box 1 is positioned at the topmost of steering gear, according to the control signal of outside, control box adjusts the liquid flow direction in commutator, realizes commutation, the commutation assembly that rolling disc 3 and floating disc 4 match, rolling disc have some spouts be evenly distributed on disc, liquid flows out from spout, preferably on rotating disk 3, be evenly distributed with 8 spouts, commutation assembly is in commutation process, floating disc 4 is motionless, by the rotation of rolling disc 3 realize Rotation With Changing to, floating disc has the liquid outlet corresponding with the spout on rolling disc 3, the quantity of described liquid outlet is twice in the quantity of the spout on described rolling disc 3, corresponding with traditional commutator, its water trap part is not moving part, by rotating the object changing nozzle exit area and realize changing the direction of a stream of water, alternatively embodiment, rolling disc 3 can be set to fixed form, floating disc 4 is connected with rotatable parts and realizes commutating, be connected to by-pass pipe 7 and rising pipe 9 in the below of floating rotating disk 4, the liquid flowed out from floating disc 4 optionally flow into by-pass pipe 7 and rising pipe 9 along with the rotation of rolling disc, between control box 1 and rolling disc 3, be provided with top cover 2, have through hole in the middle of described top cover 2, the marginal portion of described top cover 2 has the flange stretched out, and described flange is provided with screw, adopts the bolt through screw to be fixed in the main body of commutator by top cover 2, at the center of commutator, there is water inlet pipe 8, above described water inlet pipe 8, be provided with spreader 5.
Fig. 2 is the perspective view of parts in control box of the present invention.Described control box 1 comprises gear train and transmitting device.Described gear train comprises first cylinder 10 and first that swaps out and changes to cylinder 11, second changes to cylinder 12 and second swaps out cylinder 13, the drive link 14 that cylinder and first, second cylinders that swaps out connect is changed to described first, second, at the center of described drive link 14, there is transmission shaft 15, described transmission shaft 15 is connected for 2 casees with described rolling disc, controls the rotation of rolling disc 3; The transmitting device of control box 1 is used for providing control signal and timing signal, described gear train is driven according to control signal, start timing when liquid commutates, optoelectronic switch is preferably set on control box and the catch carrying out timing for shading light electric switch is set on the rotating shaft.
Spreader 5 comprises cone, float guide rod and rubber disc, the centrum of spreader 5 boosts by the liquid entered from water inlet pipe 8, floating guide rod moves upward, described floating guide rod is positioned at top cover 2 central opening position, what described spreader can enter the uniform liquid of commutator from water inlet pipe 8 is assigned to rolling disc 3, preferably there is constant overflow height entering the liquid on rolling disc 8, make the liquid flowed out from rolling disc 3 have identical hydraulic pressure, the fluid flow of each spout in same time is consistent.
Rolling disc 3 is the critical components realizing changing the direction of a stream of water, described rolling disc 3 is connected with the rotation axis extended out from control box 1, described rotation axis is by the opening at top cover 2 center, described rotation axis can drive rolling disc 3 clockwise or rotate counterclockwise, Electric Machine Control can be adopted at rotation axis 3, control the angle of rotation axis rotation according to control signal, when employing 8 spouts, preferred maximum rotation angle is 16 °.Fig. 3 is the perspective view of rolling disc of the present invention, as shown in Figure 3, rolling disc to be arranged 8 spouts, the upper surface of described rolling disc 3 is the design of concave cone face, 8 elongated slots (spout) are evenly had in the radial direction at rolling disc 3, described elongated slot is greater than the width away from ground, concave cone face part at the width of the outs open near concave cone face, and be shape wide at the top and narrow at the bottom from the appearance, this elongated slot or spout are equivalent to the nozzle of traditional commutator.
Fig. 4 is the perspective view of floating disc of the present invention.Floating disc 4 is functionally similar to the water trap of open commutator.Spout on described floating disc 4 on corresponding rolling disc 3 has fan-shaped pod apertures, corresponding to the spout of on rolling disc, described fan-shaped pod apertures comprises left side pod apertures and right side pod apertures, wherein left side pod apertures and right side pod apertures lead to the apopore of standard or the by-pass port of bypass return line respectively, if left side pod apertures communicates with apopore, right side pod apertures then communicates with by-pass port, otherwise, if left side pod apertures communicates with by-pass port, right side pod apertures then communicates with apopore, a point water sword is provided with between left side pod apertures and right side pod apertures, described point of water sword plays the effect of water conservancy diversion and isolation in commutation process, for preventing the impact that dabbles, be provided with spring device in the bottom of floating disc 4, described spring structure ensures that floating disc 4 keeps close contact state with rolling disc 3 all the time.
As shown in fig. 1, described base 6 comprises water inlet pipe 8, rising pipe 9, by-pass pipe 7 and bus structure, and provides support for whole commutator.Water through floating disc 4 apopore imports rising pipe by the water outlet honeycomb duct of 8 on base bottom commutator; And conflux in region outside water outlet honeycomb duct of the water of floating disc by-pass port, flow out commutator through by-pass pipe, be back to reserve tank.
Identical with the course of action of traditional commutator, commutator of the present invention comprises 5 states, that is: (a) bypass state; B () changes to-start detection; (c) standard water inlet state; D () swaps out-termination detection; E () recovers bypass state.
After flow apparatus starts and is stable, commutator is bypass state, first, second cylinder that swaps out keeps release state, experimental water enters commutator by water inlet pipe, current by spreader 5 jack-up, and spray downwards along the spout of 8 on rolling disc, and now spout is relative with the by-pass port of floating disc 4, water enters base and confluxes to by-pass pipe 7, is back to reserve tank.
Change to order when flow apparatus sends, the kinematic train of commutator starts, and first, second changes to cylinder promotion drive link and rotates counterclockwise, and drive link drives rotation axis, and rotation axis drives rolling disc synchronous axial system; When rolling disc spout central aims at point water sword of floating disc, fixing catch on the rotating shaft triggers photoelectric sensor and sends signal, starts timing and the flowmeter number system of flow apparatus, starts flowmeter and detects.
The cylinder that swaps out continues to promote whole gear train and is rotated counterclockwise, until rolling disc spout aims at floating disc apopore be about centre position, whole rotational travel about 16 °, water confluxes at rising pipe through the water outlet honeycomb duct of apopore and base, flow to standard, get the hang of (c)
When standard integrated flux reaches target setting, flow apparatus sends the order that swaps out, the cylinder that swaps out for a pair promotes kinematic train and rotates clockwise, and when rolling disc spout central aims at point water sword of floating disc, catch again triggers photoelectric sensor and sends signal, stop timing and the flowmeter number system of flow apparatus, commutator returns to bypass state.Complete the detection of No. 1 flowmeter.
Commutator of the present invention is under the prerequisite ensureing its commutation ability, achieve the leakproofness of structure, make commutator in the forward and backward and commutation process of commutation not with the open state of atmosphere, avoid hot water outwards to evaporate to cause by commutator and weigh inaccurate problem.The design of the primary structures such as commutator spreader, rolling disc and floating disc achieves the sealing to test medium, the difficult point of its sealing is the sealing of commutator movable member, rolling disc adopts bearing to be connected with water inlet pipe, have employed the hermetically-sealed construction of " labyrinth " formula, guarantees do not have leak of liquid.
And while obtaining closed structure, the major defect that traditional enclosed commutator exists also is avoided and overcome to commutator of the present invention.Commutator is commutated by swiveling jet nozzle, at commutation position, the spout of rolling disc and the entrance of floating disc are free surface, flowing with no pressure (similar open commutator), avoid the flow rate fluctuation caused because circulation area changes in commutation process, and decrease the risk of leaking.In addition, floating disc adopt the conical surface design, spreader can float with uninterrupted, effectively prevent commutation closed structure may cause deposit gas problem.
Except the airtight performance realizing commutator, also the partial properties of traditional commutator is optimized.At the nozzle of traditional open commutator, for overcoming the resistance of current when reducing commutation as far as possible, and dabbling of causing, the as far as possible width of Control Nozzle and the length of extended nozzle, as the design of preferred commutator of the present invention 8 nozzles, same width of jet, reduces the length of commutator under the prerequisite ensureing fluid flow area; The rotation commutating structure that commutator adopts, and the drive pattern of symmetric design, make commutation process steady, quick, have good symmetry; Adopt spring structure bottom floating disc, make it keep close contact with rolling disc all the time, effectively can reduce in commutation process and spatter water mitigation.By test, the uncertainty examining commutator is better than 0.01%.
Floating disc upper surface of the present invention and rolling disc lower surface close contact, and two surfaces produce sliding friction when commutating, therefore its surface planarity, smooth finish and tolerance fit all have high requirement, and its shunting sword top width is only about 1mm.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (7)
1. a hermetic type open commutator, it comprises: control box, and this control box has for the parts providing power that commutate; Be positioned at the rolling disc below control box, described rolling disc has some spouts; The floating disc coordinated with described rolling disc, described floating disc has the pod apertures corresponding with described spout; And be positioned at the water inlet pipe at described open commutator center, above described water inlet pipe, be provided with spreader; It is characterized in that: be provided with spring device in the bottom of floating disc, described spring structure ensures that floating disc keeps close contact state with rolling disc all the time.
2. hermetic type open commutator as claimed in claim 1, it is characterized in that: described control box is positioned at the topmost of steering gear, according to the control signal of outside, control box adjusts the liquid flow direction in commutator, realizes commutation.
3. hermetic type open commutator as claimed in claim 1, is characterized in that: between control box and rolling disc, be provided with top cover.
4. hermetic type open commutator as claimed in claim 3, it is characterized in that: in the middle of described top cover, there is through hole, the marginal portion of described top cover has the flange stretched out, and described flange is provided with screw, adopts the bolt through screw to be fixed in the main body of commutator by top cover.
5. hermetic type open commutator as claimed in claim 1, it is characterized in that: described open commutator comprises base further, described base comprises water inlet pipe, rising pipe, by-pass pipe and bus structure, and provides support for whole commutator.
6. hermetic type open commutator as claimed in claim 1, is characterized in that: described spreader comprises cone, float guide rod and rubber disc.
7. hermetic type open commutator as claimed in claim 1, is characterized in that: on described control box, arrange optoelectronic switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310405391.0A CN103438964B (en) | 2013-09-09 | 2013-09-09 | A kind of hermetic type open commutator |
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| CN201310405391.0A CN103438964B (en) | 2013-09-09 | 2013-09-09 | A kind of hermetic type open commutator |
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| CN103438964A CN103438964A (en) | 2013-12-11 |
| CN103438964B true CN103438964B (en) | 2016-01-20 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105371926B (en) * | 2015-10-29 | 2018-08-10 | 武汉浪淘石科技有限公司 | A kind of high-speed rotary for flow measurement divides water instrument |
| CN107727204B (en) * | 2017-10-17 | 2019-07-23 | 中国计量大学 | A kind of commutator and its commutation method for hot water flow standard set-up |
| CN111707334B (en) * | 2020-05-15 | 2022-12-06 | 浙江水利水电学院 | Rotary open type equidirectional commutator in liquid flow standard device and method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002048622A (en) * | 2000-08-07 | 2002-02-15 | National Institute Of Advanced Industrial & Technology | Diverter for liquid-flow-rate calibration device |
| CN101476922A (en) * | 2009-01-16 | 2009-07-08 | 朱家顺 | Totally-enclosed open type commutator |
| CN101788323A (en) * | 2010-02-11 | 2010-07-28 | 浙江省计量科学研究院 | Commutator of water flow standard device and commutation method thereof |
| CN102141426A (en) * | 2010-12-07 | 2011-08-03 | 浙江省计量科学研究院 | Fluid reversing device and reversing and timing method |
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2013
- 2013-09-09 CN CN201310405391.0A patent/CN103438964B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002048622A (en) * | 2000-08-07 | 2002-02-15 | National Institute Of Advanced Industrial & Technology | Diverter for liquid-flow-rate calibration device |
| CN101476922A (en) * | 2009-01-16 | 2009-07-08 | 朱家顺 | Totally-enclosed open type commutator |
| CN101788323A (en) * | 2010-02-11 | 2010-07-28 | 浙江省计量科学研究院 | Commutator of water flow standard device and commutation method thereof |
| CN102141426A (en) * | 2010-12-07 | 2011-08-03 | 浙江省计量科学研究院 | Fluid reversing device and reversing and timing method |
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